diff options
Diffstat (limited to 'sql/field.h')
| -rw-r--r-- | sql/field.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/sql/field.h b/sql/field.h index 477c64727b3..5c2ba4c5c84 100644 --- a/sql/field.h +++ b/sql/field.h @@ -4030,6 +4030,12 @@ public: uchar *new_ptr, uint32 length, uchar *new_null_ptr, uint new_null_bit); void sql_type(String &str) const; + /** + Copy blob buffer into internal storage "value" and update record pointer. + + @retval true Memory allocation error + @retval false Success + */ inline bool copy() { uchar *tmp= get_ptr(); @@ -4042,6 +4048,33 @@ public: memcpy(ptr+packlength, &tmp, sizeof(char*)); return 0; } + void swap(String &inout, bool set_read_value) + { + if (set_read_value) + read_value.swap(inout); + else + value.swap(inout); + } + /** + Return pointer to blob cache or NULL if not cached. + */ + String * cached(bool *set_read_value) + { + char *tmp= (char *) get_ptr(); + if (!value.is_empty() && tmp == value.ptr()) + { + *set_read_value= false; + return &value; + } + + if (!read_value.is_empty() && tmp == read_value.ptr()) + { + *set_read_value= true; + return &read_value; + } + + return NULL; + } /* store value for the duration of the current read record */ inline void swap_value_and_read_value() { |